Nut.



Patented Sept. 19, I899. T. L. PAINE.

NUT.

(Application fllnd 1hr. 80, 1899.)

No. 633,2l2.

(No Model.)

MJQAW TN! Memos PET! $0,. Mara-Una" wnsmnsmn. n. c.

Enron;

PATENT TRACY L. PAINE, OF MIL\VAUKEE, WISCONSIN, ASSIGNOR TO THENATIONAL ELASTIC NUT COMPANY, OF SAME PLACE.

NUT. r

SPECIFICATION forming part of Letters Patent No. 633,212, datedSeptember 19, 1899.

Application filed March 30, 1899. Serial No. 711,060. (No model.)

To (1/1]- whmn it may concern:

Be it known that I, TRACY L. PAINE, a citizen of the United States, anda resident of Milwaukee, in the county of Milwaukee andState ofWisconsin, have invented certain new and useful Improvements in Nuts;and I do hereby declare that the following is a full, clear, and exactdescription thereof.

My invention relates to split nuts and is an improvement on the devicepatent-ed March 1, 1892, and numbered 469,678; and it consists incertain peculiarities of construction, as will be fully set forthherein-after and subsequently claim ed.

In the drawings, Figure 1 is a perspective view, and Fig. 2 is a sideelevation, of my improved nut in its finished condition. Fig. 3 is aview of the blank, and Fig. 4 is a view of the ring from which saidfinished nut is made.

The nut made under the prior patent above named formed a perfect lockand by reason of the dovetail union of the ends of the blank from whichsaid nut was made tended to prevent undue lateral spreading or openingof the nut when it was screwed upon a bolt, and so far was satisfactory.In nuts of this class the bore of the nut is tapped slightly smallerthan the diameter of the bolt to which the nut is to be applied; but ithas been found in practice with the patented nut above referred to thatthe limit of yield inforced by the said dovetail union, together withthe fact that the parts of the nut at the line of separation mustnecessarily ride upon each other obliquely, will usually result inendwise pressure against the threads of the bolt, as well as centercontraction against the bolt, and hence, while the said patented nutwill firmly hold in place when it has been applied, there is frequentlygreat difficultyin removing the nut from the sion (marked a and b,respectively) at, each end; but instead of making the inner edges ofsaid extensions on oblique lines extending from a point below to a pointabove the longitudinal center of said strip, as in said prior patent,No. 469,678, the inner edges of said extensions follow the line of thelongitudinal center of the strip, as shown at c c, and are united to thestraight vertical end portions d d and e e of said strip on roundedlines, as shown at ff and g g in said Fig. 3. The strip A is then bentaround into an annular or ring form, as shown atv B in Fig. 4, with theend extensions a and b overlapping and with the rounded convex surfacesg g fitting within the rounded concave surfacesff of the said strip. Thering B is then put into a die of'the proper shapefor example, one with ahexagonal opening-and pressed into the required shape, after which thebore in the nut is tapped and the article is complete. As will be seenby the dotted line h in Fig. 2, the slit in my finished nut 0 cannotextend, as in the said prior patent, from the top of the nut toapointbelow the horizontal center and thence to a point above said center anddown to the bottom, and hence the dovetail lock of said prior nut isavoided and rendered impossible, while retaining all of the meritoriousfeatures of said prior patented nut, augmented by the advantagesconsequent upon the peculiarities of my improved construction.

Proper bolts are made of standard sizes, and I have discovered that withmy nuts made as hereinbefore described the nuts should be tapped withminus taps one one hundred and twenty-eighthundersize of the bolts forwhich they are intended in order to give the best results. When this isdone and the nut is applied, the nut at the line of the split will openabout one sixty-fourth of an inch, and the tendency of the nut to closewill hold it upon the bolt with a constant grip, while at the same timethis puts no extra strain end wise of the bolt or against the threads,as did the lock-nut made under said prior patcut, and hence my presentnut can be re peatedly removed from or replaced on its bolt Without wearor injuryof the threads and may even be readily applied over rusted orbattered screw-threads on a bolt, which would prevent the use of anyother nut or render it i 1. A nut provided with a slit extending indifficult, if not impossible.

It will be noted that the vertical portions of the ends of thenut-blanks (marked (1 (I) and the vertical portions of the ends of theintegral extensions a b of said blanks (marked 6 c) are of less thanone-half of the height of' the strip or blank and that said verticalportions (1 eat each end of the blank are united on rounded lines f andg and intermediate line 0, the latter linefollowing the line of thelongitudinal center of the strip or blank, and from this it follows thatin the nut made from this strip I entirely obviate the lateral lockcaused in the nut of the prior patent, No. 469,678, (on which this is animprovement,) by reason of the said vertical end portions of the stripand extensions in said prior patent being of more than onehalf theheight of the strip or blank, and apart from this the substitution ot'the rounded edges f g for the sharp angular edges of the prior patent isfound to be a great gain in the ready manufact-u re of my nut, as themeeting edges of the nut-ring shown in Fig. 4 are more rapidly andeasily forced together than with the for-' l l i vertical lines from thetop and bottom of the nut, and from different points of the bore,through the nut to points adjacent to the center, the vertical lines ofthe slitextending less than half the height of the nut, and being unitedby rounded lines merging into a lateral longitudinal line, whereby thenut will hold its place upon a bolt without being locked against lateralexpansion.

2. A split nut having a plurality of vertical faces of equal extent, theline of separation of said split extending downward from the top of thenut to a point above the horizontal center, from the bore to and throughone face of said nut and thence in a rounded line to said horizontalcenter, along said horizontal center through the adjacent face of thenut, thence in a rounded line to a point below the said horizontalcenter, and thence down to and through the bottom of the nut, so thatone face has its upper right-hand corner or portion separated therefrom,and the adjacent face has its lower left-hand corner or portionseparated therefrom, the remaining faces of said nu t, besides the twoadjacent faces just named, being free from any interruption or line ofseparation.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of \Viscousin, in thepresence of two witnesses.

TRACY L. PAlNlC.

Witnesses:

H. G. UNDEnwoou, I C. RoLoFr.

